The reviewer, Lisabeth, enjoyed all three, but had special praise for the nib bar. She eats it the way I like to–chocolate side down to let the chocolate melt a little before crunching up the nibs:

The Upala 70% Nibs bar is awesome. The nibs are only on the back side of the chocolate bar, as though they were lightly sprinkled over the chocolate just as it began to set. For that reason, this nibs bar has entered my top favourites list.

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But with this Potomac nibs bar, you can flip it upside down so the nib-free side is on your tongue, and really taste the chocolate before you get to the point of chewing any nibs. That way, you get to taste and savour the chocolate first, then experience a little crunch since the nibs are only lightly sprinkled on the back side of the bar.

Definitely a great review. Click the link above to read the whole thing. Thanks Lisabeth!